<!DOCTYPE html>
<html><head>
<style>
    .first {
        transform: translateZ(10px);
        background-color: blue;
        top: 0px;
    }
    .second {
        background-color: green;
        top: 40px;
    }
    .preserve {
        transform-style: preserve-3d;
    }
    .leaf {
        width: 100px;
        height: 100px;
        position:absolute;
    }
</style>
</head><body>

<div class="preserve">
    <div class="preserve" style="opacity:0.5">
        <div class="leaf first"></div>
        <canvas class="leaf second" width="100px" height="100px" id="canvas"></canvas>
    </div>
</div>
<script>
    var canvas = document.getElementById("canvas");
    var ctx = canvas.getContext("2d");
    ctx.fillStyle = "red";
    ctx.fillRect(0, 0, 100, 100);
</script>
</body>
</html>

